446 LICHENACEI. [LECANORA. 



0,003-4 mm. thick ; paraphyses thickish, somewhat jointed, thick- 

 ened and colourless at the apices ; hypothecium colourless ; hyme- 

 nial gelatine bluish, then often wine-red with iodine. Carroll, 

 Journ. Bot. 1867, p. 255 ; Cromb. Lieh. Brit. p. 50 ; Leight. Lich. 

 Fl. p. 226, ed. 3, p. 217. Lecidea albocarnea Nyl. Flora, 1876, 

 p. 234 (cfr. Flora, 1879, p. 361); Cromb. Grevillea, 1876, p. 26; 

 Leight. Lich. Fl. ed. 3. p. 340. Brit. Exs. : Cromb. n. 164 ; Larb. 

 Lich. Hb. nos. 97, 133. 



Looks like a Lecidea near L. sphceroides, but is a true Lecmiora allied 

 to the preceding species, as shown by the distinct thalline ihargin in very 

 young apothecia (seldom present in herbaria specimens) and by the cha- 

 racter of the spermogones. It is somewhat variable as to the thallus and 

 apothecia, whence the form and vaiiety that follow. The spores are rarely 

 simple, or in the same apothecium obsoletely 1-septate, so that Nylander 

 ut supra named this state Lecidea albocarnea. The spermogones have 

 the spermatia arcuate, thin, 0,014-22 mm. long, scarcely 0,001 mm. 

 thick. 



Hab. On schistose rocks and walls in maritime and upland districts. 

 Distr. Local, though at times plentiful in the Channel Islands, S.W. 

 England, S. Wales, S.W. and N.W. Ireland. B. M. : Near Rozel, Island 

 of Jersey ; Moulin Huet Bay, Island of Guernsey. St. John's, Devon- 

 port, S. Devon ; near Penzance, Cornwall ; Goodwick Bay, Pembroke- 

 shire. Derryquin, Killarney, co. Kerry ; near Kylemore and Dough- 

 ruagh mts., Connemara, co. Galway. 



Form bellissima Leight. Lich. Fl. ed. 3 (1879), p. 217. Thallus 

 thinnish, subgranulate. Apothecia rather small, usually congregate, 

 pale-rosaceous, slightly pruinose ; spores rarely simple. Brit. Exs. : 

 Larb. Lich. Hb. n. 97. 



Differs in the more granulose thallus and the colour of the apothecia, 

 which occur for the most part in small, more or less scattered groups. It 

 is apparently the same as form congregabilis Nyl. Flora, 1879, p. 361, 

 Cromb. Grevillea, viii. p. 114, judging from the typical specimen seen of 

 the latter. 



Hab. On shady walls in a maritime district. Distr. Very scarce in 

 N.W. Ireland. B. M. : Cleghan, near Kylemore, co, Galway. 



Var. /3. accessitans Nyl. Flora, 1879, p. 361. Thallus very thin, 

 leprose or subevanescent. Apothecia convex, immarginate ; spores 

 usually simple. Cromb. Grevillea, xviii. p. 69. Lecidea accessitans 

 Nyl. Flora, 1876, p. 306 ; Cromb. Grevillea, 1876, p. 26 ; Leight. 

 Lich. Fl. ed. 3, p. 260. Brit. Exs. : Larb. Lich. Hb. n. 224. 



Characterized by the less developed thallus, which in the specimens 

 seen is scarcely visible, and by the spores being most frequently simple 

 (not definitely 1-septate). 



Hab. On shady rocks in a maritime district. Distr. Only sparingly in 

 N.W. Ireland. B. M. : Near Renvyle, Connemara, co. Galway. 



137. L. umbraticula Nyl. Flora, 1879, p. 205. Thallus effuse, 

 thin, subleprose, greenish (K , CaCl ). Apothecia small, some- 



